2 Physical Properties
2.1 Tenacity
2.3 Solubility
Not Available
Not Available
2.5 Durability
Not Available
Not Available
2.7 Specific Gravity
2.90-3.003.77-3.95
1
7.18
2.11 Fracture
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Metallic
Not Available
2.12 Cleavage
2.13 Mohs Hardness
2.15 Chemical Composition
CaBSiO 4(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Ca 3Fe 2(SiO 4) 3Ulrich Henn and Claudio C.